Electric switch for laundry machines



Aug. 25, 1925. 1,550,800

` F7 A; ClLB ET AL ELECTRIC SWITCH FOR LAUNDRY MACHINES' Filed Aug. 2, 1923 @E 2/ (IB Patented Aug. 25, 1925.

FRANK A. GILB AND RICHARD ROGST, 0111 LOS ANGELES, CALIFORNIA.

ELECTRIC SWITCH FOR 'LAUNDRY :MACHINES Application lc. August 2, 1923.

T0 all 107mm t may concern Be it lnown that we, FRANK A. GILB and RICHARD Roos'r, both residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful improvement in Electric Switches for Laundry Machines, of which the following is a specification.

ln the operation of many types of ma chinery, and particularly in the operation of washing machines, it is necessary to cause an electric motor to operate through a predetermined cycle. 1n the case of a washing machine, it is necessary that the motor revolve for a certain number of revolutions in a positive direction, and that the motor be then reversed, operating` for a certain number of revolutions in a negative direction. rllhis can be convenientlyT accom` plished by the use of a motor operated switch, the motor of which runs at a c0nstant speed, the switch being so constituted that the connections of the main motor driving the washing machine are changed at regular intervals for the purpose of completing the desired cycle.

Qur invention relates to a switch which is particularly adapted for use in this connection, or for use wherever frequent opening and closing of an electric circuit is necessary.

The principal object of the invention is to provide a switch of this character, which can be cheaply constructed and which is very durable in operation.

A further object of the invention is to provide a switch which will have a quick break.

A still further object of the invention is to provide a switch in which the parts liable to injury can be readily inspected and replaced.

lFurther objects will be made evident hereinafter.

Referring to the drawing which is for illustrative purposes only,

Fig. 1 is a plan of a portion of a washing machine switch embodying our invention.

liig. 2 is an elevation partly in section of the same mechanism.

1n the form of the invention shown, we provide a channel 11 which is preferably formed of insulating material, such as slate or fibre. Mounted on the channel 11 are a plurality of bearings 12, in which an Serial No. 655,266.

operating shaft 13 is free to turn. The operating shaft 13 may be driven at a constant speed from an electric motor, or other source of power, not shown. Rigidly mounted on the shaft 13 is a cam 14, havingI a release shoulder 15 and a block shoulder 16, the portion of the cam between these shoulders being called an application face 17.

Also mounted on the channel 11 is a primary s'tandard 20, having a cylindrical hole therethrough in which a main tube 21 is free to slide. rThe main tube is provided with ears at one end thereof, in which a pin is mounted. rllurniirg freely on the pin is a Vlibre roller 24, this roller being so placed that it is engaged by the cam 14. Formed inside the tube 21 are inwardly projccting leads 26, against which one end of a compression spring 27 is free to rest, the other end of this spring bearing against a pin 28 which is secured in the primary standard 2O and which projects through slots 2S) in the main tube 21. Also mounted on the tube 21 is a carbon holder tube 30, this tube having a small screw 31 project ing into the slot 29. Mounted in the end of the carbon holder tube is a threaded stud 35 on which a copper contact 36 is screwed. r@lumped against the end of the tube 30 by means of the copper contact 36 is a strip of flexible contact material 37. This is a strip hanging down in a free lobe 38 and beine; secured by a screw 39 to the primary standard 20. Situated inside the tube 21 is a compression contact spring 40 which presses against an abutment 41 formed in the tube 21, and against the end of the tube 30.

Also secured on the channel 11 is a sec ondary standard 45 which carries a carbon block 4G, which is secured therein by means of a clamp 47.

rlhe operation of the invention is as follows:

The cam 14 being turned in a clockwise direction as indicated by the arrow, Fig. 2, this cam acts upon the roller 24 against the spring 27, the lifting surface 16 forcing the roller to the left and the application face 17 holding it to the left for the purpose of completing the circuit. This is accomplished by the contact of the member 36 on the member 46, the current then flowing from the primary standard 2O through the flexible strip 37 to the contact 36, from the contact 36 to the carbon block 4G, and from this bleek to the standard yihis eoinpietion of the eireuit niej] be utiiized 'for eentroiiingl' the Washing; inaehine, or for other purpoees. The degree oi inoi'einent of 'the niain tube Qi7 due to the eontrzieture oit the roiier by the eain iii is siuiiieient to eoni press the Spring i0 and provide a resiiient eontaet be'n'een the nieinbers 36 und ,i-S. ihie` :iiou's tor irregniiaritj,T or veur in the nieinbers 3G and i6, and aise meiste in ob i'ui'ning;I a quick breek, as Wiii hereinaiter be eipieined.

AS the Vear-.i i-iturna the roiier 2li; ieares the nppii. :ation 'ieee 1i', due to the receding diameter of the ennn Shown at i5. Viihe e prin 1' 27 then forcee the nniin tube 2i to the right, as Shown in Due to the 'inet that the rs'prine' i() initiaiij-,iv eonipr eee the Copper eontaiift PHS in heid against the earbon bioehr 4i@ 'for a short period`r during` 'whieh the tube 2i iS inovingr to the right. iifhenerer the end et the Siot Q() reneheS the feifeW 3i, any 'further extension oit the Spring ai() iS rendered inuioesibie. and the Contact 3G niusxtnieve with the trdie 2i. Jie the tube 2i is, ziirendy inoi'ed e short dif-tzinee. it is evi ient tinu; the copper eontnet 36 in quiekiy sepa 'ated 'freni the eurbon hioek rliti, Iand er 'ery quiei: break in obtained.

it Wiii 'further be evident 'that the eontirets VVVi-(S and 3G u'hieh are eubjeet to Wearj can be very readiiy repioeed und that the1 are in :i poF-sition where the),r can be readii)7 inspected und repaired Without repieeenient.

Tyre eiaini :is our invention:

i. it porter operated eieetrie invit-eh eonr prising: n driving; Shaft; a i'ixed bearii'ig in which *nid I@hait is free to tu ng a Cani rigidi;V secured en said Sharit; e fixed inery Standard haring' a eyiindrieai open n' therein; a nniin tube Siidingg' 'ifreeiy in Seit` opening; ears iiorined on one end et Said tube; e pin Carried by seid en en insuiatingr reiier carried en said pin, said insulating' roiier eontaeting with und beiney aetuated by Said eain; compression spring ineide said tube; in invardiy pro jeeting iip torn'ied inside seid tube ngainet which one end et seid Coninreesion spring' abrite; e he),7 fixed in Said prin'izuy standard and attending through siete Lorined in said tube, the other end oi Said eoinpr S'Sion spring; abutting against Suid hey, Suid Spring` being;- so Situated es to heid Said roiier against 'seid earn; a eontaet .beider tube eurosindiiigl Said ninin tube at the end o'i Suid niain tube opposite said roiier; a threaded Stud projecting frein said Contact beider tube; n coppi' eontuet threaded on 'ri threaded Stud: a. etri'x-'i @if iifenibie eo'nuueting ineteriai haring one end Ciau betwen said copper eontaet and the enfoi aet iioider tube said Strip ot freni* ieting n ateriai extending; in e 'iree aid 'prin'.aifyY standard noon n'hieh Said cont bie eener loon to e :retienen copper eontaet.

2. ik power operated eieetrze switch eo1nprising: a driving shaft: i iiXed bearing; in which Suid Shaft 'is 'tree to turn; a Cani rigridiy Secured on Said Shaft: a fixed prinmry standard having' a eyiindrieai opening' therein; :i inain tube Siiding 'freely in said opening; vars iforined on one end ot Said tube; n 'pin carried by said ears; an insniating 'roiier carried on said pinl` Said insuiatingr roiier eontaeting with and beingl aetna'ted by seid cnin; a compression Spring' inside Said tube; an invardij,Y projeeting;l iip toi-ined 'inside Seid tube against unich one end et Seid Compression Springl abuyl'e; a key fixed in seid prin'iary stent ard and extending; through siete 'formed in said tube. the other end oif Seid eoinpreseion Spring' abutting' against Seid hey, said spring' being` Se Situziied as to heid Said roiier against Said een: n eontaet hoider tube Surrouiniinn Suid nrain tube ai the end et Said niain tube opposite said roiier; a threaded Stud projeet inse' trein Said Contact hoider tube; a copper rontaet threaded on ,nid threaded Stud: a Strip oir iiexibie eondiiet-ineY materia] having;Y one end eizunped between Said copper contnei and the end oil Said Contact hoider tube, Said Strip oi? iexibie Conducting' njniterizii ex tending' in a tree ioop to said primari.' Sianduird upon which the other end o'i: s( i Strip et ieibie eonduetinp; inaterizii is see 'ed; n compression Contact Spri' inside said n'iain tube; an :ibui'n'ient inside Said inziin tubeagninst Whieh one end oi Said compression Contact spring nbuts, the other end o'i" Said eoinpression Contact spring' abutting against said eontaetiioider tube; serene: secured in smid Contact hoider tu e projecting into siots in Said inein tube: end a fixed carbon bioek situated in a position to be engaged by Seid copper Contact.

fr power operated eieetrie switch Coin prising: a driving' Shaft; a 'fixed beuring in n'hieh Suid shaft 'is 'tree to turn; n eain rigridiy Secured on seid shaft; e iixed pri inarjv standard in ving :i eyiindri 'fai openingl therein; a ninin tube siidine' 'ifreei'v in Said opening; eers 'formed on one end ot said tube; a piu carried by said ears; an insuiat- .ine` roiier ez r 'ied on Said pin, :aid insuiatinf;v reiier contacting' with and being' aetnated by said itung n, compression springy in,-

nesaeee side said tube; an inwardly projecting lip Jorined inside said tube against which one end et said compression spring abuts; a lined in said ing through other end otl ting against rer priinary standard and ,nt-endslots termed in said tube; tl said compression spring abutsaid key, said :'ipring li situated to hold said rei? se ci cani; a contact holder tube surrounding said inain tube at the end ci. said inain tube opposite said roller; a threaded stud oronu l jecting troni said Contact holder tube; z, copper contact threaded on said tl ree stud; a strip et flexible conducting material haring one end clainped between said copper contact and the end of said co tact holeei` tube; said strip et i' e'ble conducting material extending in a 'tree loop to priinary standard upon which the other end ot said strip oi tleifible conducting niateria is secured; a res i ent connection between said copper Contact holder and said niain tube; an abutment inside said inain tubo against wliich one end et said conipr sion contact spring abuts; tlie other end et said compression contact spring abutting against said Contact holder tube; screws secured in said contact helder tube projecting into slots in said niain tube; and a fixed carbon block situated in a position to be engaged by said carbon Contact.

4f. d power operated electric switch coinprising: a driving shaft; a iixed bearing in which said shaft is tree to turn; a cani rigidly secured on said shaft; a fixed priH inary standard having a cylindrical opening` therein; a niain tube sliding lfreely in said opening; ears 'formed on one end et said tube; a pin carried by said ears; an insulat4 ing roller carried on said pin; said insulating roller contacting with and being actu ated by said cani; a compression spring inside said tube; an inwardly projecting lip formed inside said tube against which one end et said compression spring abuts; a irey fined in said primary standard and extending through slots termed in said tube, the other end oi' said compression spring abutting against said key7 said spring being situated as to hold said roller against said cani; a contact holder tube surrouncing said niain tube at the end oi: said inain tube opposite said roller; a threaded stud projecting troni said contact helder tube; a copper contact threaded on said threaded stud; flexible means 'for electrically connecting said copper Contact with said priinary standard; a resilientI connection between said copper contact holder and said niain tube; an abutinent inside said niain tube against wiiich one end oi said compression contact spring abuts; the other end et said compression contact spring abutting against said contact holder tube; screws secured in said contact holder tube projecting into slots in said inain tube; and a lined carbon bloei;

situated in a position te be engaged by said contact.

s. Bi power operated eletric switch couiprising: a driving shait; a` iifefl bearing in which said sbatt is iiree to turn; a een rig i iv i ured on sliatt; i, uifed pi znary s dard la i Q i l` oiiiening` therein; a inain w eely in said `woning; ears wibo; a;

fd ears; an i d pin; said insu b and b sion spr rejecting lip' t which one abats; a he A and entendni said tubev` tbe i" end of said cenni ession spring abut- `l f s ing against said lrcyQsaid pringY being so o hold said roller against said .ct holder tube surrounding said at the end et said inain tube oppoid roller; a tbreaded stud projecting aid Contact holder tube; a copper cont tireaded on said threaded stud: a. relient connection between s ic copper connside said inain tube against wbicli one end ot said compression contact spring` abuts, the other end oi said con pression Contact spring abutting against said contact holder tube; screws secured in said Contact holder tube proj ect-ing int-0 slots in said inain tube; and a 'dried carbon block situated in a position to be engaged by said carbon contact.

G. A. power operated electric switch coniprising: a driving shaitt; a lined bearing in which said shzft is tree to turn; a cani rigidly secured on said shaft; a fined priinary standard having a cylindrical opening therein; a niain tube sliding freely in said opening; ears i'iorined on one end of said tube; a. pin carried by said ears; an insulating roller carried en said pin, said insulatino; roller contacting with and being actuated by said cani; a compression spring inside said tube; an inwardly projecting lip iorrned inside saidL tube against which one end ot said compression spring abuts; ay key vlined in primary standard and extend ing through slots tornied in said tube1 tbe other end et said compression spring abutting against said key, said spring being so situated as to hold said roller against said cani; a copper contact holder; a copper contact {i3-red in said holder; a resilient connection between said copper contact holder and said niain tube; an abut nent inside said inain tube `Si st which` one end et said compression contact spring abuis7 the other end et said compression Contact spring abutting against said contact holder tube; screws secured in said Contact holder tube project lil) iug into slots in said inain tube; and a fixed carbon block situated in a position to be engagged by said carbon Contact.

A power operated eleetrie switch c0inprising: a driving; shalt; a tired bearing in ,vhieh said shaft is free to turn; a cani rigidly seeured on said shaft; a fixed primary standard having' a cylindrical openingtherein; a niain tube sliding treely in said opening; ears tori'ned on one end of said tube; a pin carried by said ears; an insulating roller carried on said pin, said insulatine` roller contacting` with and being actuated by said ears; resilient ineans tor holding' iid roller against said cani; a copper Contact holder; a eogper contact lined in said holder; a resilient connection between said copper Contact holder and said inain tube; an abutment inside said main tube against whieh one end ot said compression eontaet springv abuts, the other eud oi said compression contact spring abutting against said Contact holder tube; screws seeured in said eontact holder tube projecting;` into slots in said niain tube; and a. fixed carbon block situated in a position to be. engaged by said carbon contact.

8. A power operated electric switch cont prising: a driving shaft; ay iixed bearing in whieh said shai't is tree to turn; ay cam rigidly secured on said shalt; a` iixed primary standard having a cylindrical opening; therein; a inain tube slidingr freely in said opening; a roller carried by said inain tube in such a position that it ean inale contact with said cani; resilient ineans ttor holding said roller against said cani; a copper contact holder; a Copper Contact fixed in said holder; a resilient connection between said copper Contact holder and said niain tube; an abut-nient inside said inain tube against which one end ot said compression contact spring abuis, the other end et said compression contact spring abutting;l against said contact holder tube; screws secured in said contact holder tube projecting into slots in said inain tube; and a fixed cariiion bloei; situated in a position to be engaged by said copper Contact.

.ln testimony whereof, we have hereunto set our hands at Los Angeles, California, this 27th day ot July, 1923.

FRANK A. GILB. RlCHARD ROOS@ 

